Abstract
In order to achieve the high pressure and high temperature by cylindrically converging shock wave, axially symmetrical shock wave is widely considered to be more effective than non-symmetrical shock wave. Numerical simulations in this paper clarifies the effect of non-symmetricity of shock waves on the highest pressure achieved near the central axis. It is found that the proper amount of the non-symmetricity of shock wave leads to higher pressure near the central axis compared to the completely symmetrical shock wave.